Steam-boiler



T. E. BUTTDN.

STEAM BOILBR.

(No M odel.)

,608. Patented Dc. 16', 1890.

| I ...f 1..... I A.

WITNESSES':

FFICE@ THEODORE E; BUTTON, OF lVATERFORD, NEV YORK.

STEAM-BOILER.

SPECIFICATION forming part oi' Letters Patent No. 442,608, dated December 16, 1890.

Application iiled February 26, 1890. Serial No. 341.815. (N0 modem To all whom t may concern:

Be it known that I, THEODORE lil/BUTTON, a citizen of the United States, residing at lVaterford, county of Saratoga, and State of New York, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

My invention relates to such improvements;

and it consists of the novel construction and combination of parts hereinafter described, and subsequently claimed.

Reference may be had to the accompanying drawings, and the letters ot reference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several iigures therein.

The object of my invention is to provide a steam-boiler having depending water-tubes or loops permanently closed at their lower ends, with means for easily and quickly discharging the water from such tubes.

Figure 1 ot' the drawings is a view in side elevation of a trunnion supported boiler tipped or turned from a vertical to a horizontal position. Fig. 2 is a central vertical section of the same in an upright position, taken through the trunnions and trunuion-supports showing some of the depending tubes. Figs.

and 4 are respectively views in side elevation and central vertical section of one of the depending tubes or loops detached.

In illustrating` my improved device I have shown a part of one of that class of boilers with depending water-tubes shown and described in United States Letters Patent No. 387,393, issued to me August 7, 1888, for improvements in steam-boilers, to which patent reference may be had.

A and B are respectively the outer and inner shells of the boiler.

The crown-sheet C is provided with n umerous threaded apertures adapted to receive the upper threaded ends of the water-tubes E, which depend from and are supported by the crown-sheet.

Coal is admitted through the supply-tube D to the fire-grate F, around and above which the tubes are arranged to receive heat therefrom, and from the products of combustion as they pass from the fire out through suitable fines and pipes. (Not shown.)

The tubes or loops are in the form of the Bundy radiator-loop. These tubes have their inlet and outlet in one and the same end, as at G, Fig. 4. The lower end is closed, and the water circulates by passing down one channel G and up the other G2. The water in the channel subjected to the greater dcgree ot heat rises, while that in the cooler channel falls, thus establishing a current through the loop. To establish such circulation, itis necessary that the open end ot the tube or loop should be the upper end, and the upper end is threaded and inserted in the crown-sheet to communicate with the Waterspace in the boiler. It is apparent, therefore, that the tubes will always be filled with water so long as there is water in the boiler above the level of the crown-sheet, also that the tubes cannot be emptied by drawing the water from the boiler, nor in any other convenient manner, except by inverting the tubes. In the cold season the Water in the tubes would freeze and destroy them if for any reason the lire should be withdrawn and water left in the tubes. It is also of advantage to be able to empty the tubes or loops for cleaning or repairing.

By providinga boiler having depending Water-tubes closed at the lower ends with central trunnions H, secured to the outer shell as by rivets H, and mounting such trunnions in bearings upon suitable supports J, I am able to empty all the tubes at once by turning the boiler from the vertical to a horizontal or partially-inverted position, iirst uncoupling the water or steam connections, (not shown in the drawings) the movement ot the boiler being indicated by dotted lines.

The steam-pipe K, leading .from the top ot the boiler, may be connected in any known manner with a steam-supply pipe, and the water-supply pipe may be coupled through one of the trunnions made hollow and connecting with the interior of the boiler, as shown in Fig. 2.

I am aware that boilers adapted to be rcvolved upon journals are not new, such coustruction being set forth in Patent No.170,032, granted to Vail, November 16, 1875, and such matter is not of my invention. Neither do I claim the particular form of tubo illustrated herein.

IOS

It iS 'a characteristic of my improvement lower ends with each other and at their upper that the tubes can be entirely emptied by the ends with the water-space, of boiler-supportrotaton of the boiler-a result never before ing trunnions and trunnien-supporting bear- 15 attained. In the revolving boiler above ings, whereby the water-tubes can be entirely 5 named there Were no water-tubes and the inemptied, substantially as described.

tertubular Water-space could not be Wholly In testimony whereof I have hereunto Set freed from water by rotating the boiler. my hand this 22d day of February, 1890.

IVhat I claim as new, and desire to secure by Letters Patent, is- THEODORE E. BUTTON. 1o In a steam-boi1er, the combination, with a Witnesses:

series of depending Water-circulating loops, GEO. A. MOSHER,

having the legs of each loop con neeted at their CHARLES T. FAULKNER. 

